Re: [PATCH] atomic: add atomic_inc_not_zero_hint()

Christoph Lameter
2010-11-15T13:57:16Z

On Sat, 13 Nov 2010, Paul E. McKenney wrote:

> On Fri, Nov 12, 2010 at 01:14:12PM -0600, Christoph Lameter wrote:
> >
> > prefetchw() would be too much overhead?
>
> No idea. Where do you believe that prefetchw() should be added?

It is another way to get an exclusive cache line
for situations like this. No need to give a hint.